CVE-2026-39544
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedImproper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in themeStek LabtechCO labtechco allows PHP Local File Inclusion.This issue affects LabtechCO: from n/a through <= 8.3.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA PHP Local File Inclusion vulnerability exists in the LabtechCO theme (version 8.3 and below) where user-controlled input is used in include/require statements without proper validation. This allows attackers to include arbitrary PHP files from the server filesystem, potentially leading to remote code execution.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- High
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm LabtechCO theme is installedInspect the wp-content/themes directory for the labtechco or themestek-labtechco folder, or check the theme name via WordPress admin appearance sectionAffected if The LabtechCO theme by themeStek is present in the WordPress themes directory
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Identify the installed theme versionOpen the style.css file in the theme directory and locate the 'Version:' comment in the file header, or check theme.json for version informationAffected if The version number found cannot be verified against a patched version or is earlier than any known secure release
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Locate vulnerable file inclusion pointsSearch the theme directory for PHP files containing include, require, include_once, or require_once statements that use variables for file paths (e.g., include($file); or require($_GET['page']);)Affected if Dynamic file inclusion using unsanitized user input is found in files like header.php, footer.php, or template files
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Verify parameter accessibilityTest whether URL parameters used in file inclusion (such as ?file=, ?page=, ?template=) can be manipulated to include local files like /etc/passwd or ../../wp-config.phpAffected if The application allows path traversal through inclusion parameters and returns file contents
The environment is affected if the LabtechCO theme is installed and contains dynamic file inclusion code that can be triggered via URL parameters without proper validation.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade to a patched version of LabtechCO. If no patch is available, implement strict whitelist-based input validation on all file inclusion paths and disable allow_url_include in PHP configuration.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-39544 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-39544 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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